Application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification

Abstract

The present invention relates to the field of water treatment technology, and specifically to an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification. The porosity of the hydrophilic porous biological carrier is at least 90%, and the surface of the carrier contains microscopic pores, and the pore size of the microscopic pores is 1-3000 nanometers. A variety of microorganisms are attached to the surface of the carrier, and the microorganisms decompose organic matter and certain inorganic poisons in the aquaculture wastewater through biochemical reactions in the body, so as to convert them into stable and harmless substances; the hydrophilic porous biological carrier has excellent hydrophilicity, high microbial fixation strength, and a microbial film can be formed on the surface of the carrier. The thickness of the microbial film can reach 2-4 mm, and the aquaculture wastewater purification effect is excellent. In the preparation process of the present invention, no solvent, cross-linking agent, or curing agent needs to be added, and the obtained hydrophilic porous biological carrier can be directly used without post-treatment, and the operation is simple and suitable for large-scale production.

Description

Technical Field

[0001] The invention relates to the technical field of water treatment, and in particular to the application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification. Background Art

[0002] Traditional aquaculture water purification mainly includes physical and chemical methods. Physical purification methods mainly use physical effects, and the chemical properties of pollutants are not changed during the treatment process, including fences, screens, aeration, sedimentation, filtration, adsorption, etc. Common chemical methods include neutralization, complexation, coagulation, oxidation-reduction, etc.

[0003] Now the market has a method of purifying aquaculture water through biochemical treatment. Biochemical treatment is a water treatment method that uses microorganisms in the natural environment and decomposes organic matter and certain inorganic poisons (such as cyanide and sulfide) in wastewater through biochemical reactions in microorganisms to convert them into stable and harmless substances. It has the following characteristics: biofilm has strong adaptability to changes in sewage quality and water volume, and is easy to manage; microorganisms are fixed on the surface of the carrier, and advanced microorganisms with a long generation time can also proliferate, the biological phase is richer and more stable, and less residual sludge is produced; it can treat low-concentration sewage. However, the biofilm method also has shortcomings: the biofilm carrier increases the investment of the system; the specific surface area of ​​the carrier material is small, the volume load of the reaction device is limited, and the space efficiency is low. Therefore, the biofilm method is mainly suitable for the treatment of small and medium-sized sewage. For this reason, the field of aquaculture water purification urgently needs a carrier with high specific surface area, high microbial fixation strength, easy processing and convenient use. Summary of the invention

[0004] In view of the above technical problems, the present invention provides an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification.

[0005] As a preferred technical solution, the porosity of the hydrophilic porous biological carrier is at least 90%.

[0006] As a preferred technical solution, the surface of the hydrophilic porous biological carrier contains microscopic pores.

[0007] As a preferred technical solution, the diameter of the microscopic pores is 1-3000 nanometers.

[0008] As a preferred technical solution, the hydrophilic porous bio-carrier uses the microbial membrane on the surface of the carrier to purify organic matter.

[0009] As a preferred technical solution, the microorganisms in the microbial film include bacteria, fungi, actinomycetes, protozoa and higher animals.

[0010] As a preferred technical solution, the hydrophilic porous biological carrier is a hydrophilic macromolecular material.

[0011] As a preferred technical solution, the hydrophilic macromolecular material includes hydrophilic polyurethane, hydrophilic acrylate, and polyvinyl alcohol.

[0012] As a preferred technical solution, the raw materials of the hydrophilic polyurethane include polyisocyanate and hydrophilic polyether polyol.

[0013] As a preferred technical solution, in terms of weight ratio, the polyisocyanate is 10-30 parts and the hydrophilic polyether polyol is 40-60 parts.

[0014] As a preferred technical solution, the hydrophilic porous biological carrier uses water as a foaming agent to form pores through foaming.

[0015] The present invention has the following beneficial effects:

[0016] 1. The hydrophilic porous biological carrier of the present invention can be attached to the surface of various microorganisms, which decompose organic matter and certain inorganic poisons in aquaculture wastewater through biochemical reactions in vivo, and transform them into stable and harmless substances.

[0017] 2. The hydrophilic porous biological carrier of the present invention has excellent hydrophilicity, strong microorganism fixation strength, and can form a microbial film on the surface of the carrier. The thickness of the microbial film can reach 2-4 mm, and the aquaculture wastewater purification effect is excellent.

[0018] 3. After the aged biofilm falls off, the surface of the hydrophilic porous biological carrier of the present invention can re-adsorb, grow, and thicken the biofilm until it falls off again. From adsorption to shedding is a growth cycle. That is, the hydrophilic porous biological carrier of the present invention can also have an excellent purification effect when recycled in aquaculture.

[0019] 4. In the preparation process of the present invention, no solvent, cross-linking agent or curing agent needs to be added, and the obtained hydrophilic porous biological carrier can be used directly without post-treatment, which is simple to operate and suitable for large-scale production. DETAILED DESCRIPTION

[0020] The content of the present invention can be more easily understood by selecting the following detailed description of the preferred implementation method of the present invention and the embodiments included. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those of ordinary skill in the art to which the present invention belongs. When there is a conflict, the definition in this specification shall prevail.

[0021] As used herein, the terms "comprises," "including," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises the listed elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

[0022] When an amount, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values ​​and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pairing of any upper range limit or preferred value with any lower range limit or preferred value, regardless of whether the range is disclosed separately.

[0023] In addition, the indefinite articles "a" and "an" before the elements or components of the present invention have no restrictions on the quantity requirements (i.e. the number of occurrences) of the elements or components. Therefore, "a" or "an" should be interpreted as including one or at least one, and the elements or components in the singular form also include the plural form, unless the number is obviously intended to be in the singular form.

[0024] The invention provides an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification.

[0025] In some preferred embodiments, the porosity of the hydrophilic porous biocarrier is at least 90%.

[0026] The porosity refers to the percentage of the pore volume in the hydrophilic porous bio-carrier to the total volume of the material in the natural state. The larger the porosity, the larger the specific surface area of ​​the material, and the larger the specific surface area, the faster the formation of a highly active biofilm. The porosity of the hydrophilic porous bio-carrier of the present invention is more than 90%, which can provide a good growth space for microorganisms.

[0027] In some preferred embodiments, the hydrophilic porous biological carrier has microscopic pores on its surface.

[0028] In some preferred embodiments, the microscopic pores have a pore size of 1-3000 nanometers.

[0029] Preferably, the microscopic pores have a diameter of 20-100 nanometers.

[0030] When organic wastewater flows through the hydrophilic porous biological carrier, suspended matter and microorganisms in the water are adsorbed on the solid surface. The microorganisms grow and reproduce using the organic substrate, gradually forming a layer of slime-like biofilm on the surface of the carrier. The microbial film is used to purify organic matter.

[0031] The microorganisms in the microbial membrane of the present invention include bacteria, fungi, actinomycetes, protozoa and higher animals. The microorganisms decompose organic matter and certain inorganic poisons in wastewater through biochemical reactions in the body, and transform them into stable and harmless substances.

[0032] The bacteria include, but are not limited to, aerobic, anaerobic and facultative bacteria.

[0033] The hydrophilic porous biological carrier is a hydrophilic macromolecular material.

[0034] The hydrophilic macromolecular material includes hydrophilic polyurethane, hydrophilic acrylate and polyvinyl alcohol.

[0035] The hydrophilic macromolecular material of the present invention is a hydrophilic polyurethane, which has a porous network structure, has the characteristics of large specific surface area, strong adsorption capacity, etc., and the material molecular chain carries active groups such as carbamate bonds, hydroxyl groups and other hydrophilic groups, which greatly improves the hydrophilicity and biological affinity, is beneficial to the adsorption and reproduction of microorganisms on the carrier surface, thereby increasing the contact between microorganisms and sewage and improving the pollutant removal efficiency.

[0036] In some preferred embodiments, the raw materials for preparing the hydrophilic polyurethane include polyisocyanate and hydrophilic polyether polyol.

[0037] In some preferred embodiments, the polyisocyanate is mixed in an amount of 30-60 parts by weight.

[0038] In some preferred embodiments, the hydrophilic polyether polyol is mixed in an amount of 40-80 parts by weight.

[0039] In some preferred embodiments, the preparation of the hydrophilic porous bio-carrier further includes 1-10 parts of a foaming agent, 1-2 parts of a catalyst, 1-5 parts of a chain extender, and 1-2 parts of a uniform foaming agent.

[0040] The present invention does not particularly limit the polyisocyanate, and examples thereof include: isocyanate (IPDI), 1,6-hexamethylene diisocyanate (HDI), toluene diisocyanate (TDI), diphenylmethane-4,4′-diisocyanate (MDI), xylylene diisocyanate, methylcyclohexyl diisocyanate, tetramethylxylylene diisocyanate, IPDI trimer, HDI trimer, TDI trimer and MDI trimer.

[0041] The polyisocyanate described in the present invention is PM200 toluene diisocyanate produced by Dada Chemical.

[0042] The hydrophilic ether polyol of the present invention is a polyether in which the propylene oxide content in the preparation raw material is higher than that of the ethylene oxide.

[0043] Furthermore, the number average molecular weight of the hydrophilic polyether polyol is 1000-6000.

[0044] Furthermore, the number average molecular weight of the hydrophilic polyether polyol is 4,000.

[0045] The polyether polyol described in the present invention can be purchased from the market or synthesized by oneself.

[0046] In some preferred embodiments, the mass ratio of propylene oxide to ethylene oxide is 1:3.

[0047] The foaming agent of the present invention is water, and preferably, the water is distilled water.

[0048] The catalyst of the present invention is selected from dibutyltin dilaurate, stannous octoate and organic bismuth catalyst.

[0049] In some preferred embodiments, the catalyst is stannous octoate.

[0050] The chain extender of the present invention is selected from one or more of 1,4-butanediol, diethylene glycol, trimethylolpropane, ethylene glycol, glycerol, 1,4-cyclohexanediol and resorcinol hydroxy ether.

[0051] The chain extender of the present invention is compounded from ethylene glycol and glycerol, and the ratio of ethylene glycol to glycerol is 3:1.

[0052] The foam balancing agent of the present invention is organosilicon DC193C.

[0053] The inventors found that the material prepared by compounding polyisocyanate, hydrophilic ether polyol, blowing agent, catalyst, chain extender and uniform foaming agent in a certain proportion has excellent hydrophilicity, which is the key to the easy attachment of microorganisms on the biological carrier. A large number of microscopic pores are produced to provide a good growth space for microorganisms. At the same time, polyurethane presents a porous three-dimensional network structure with extremely high stability, and the service life of the biological carrier is longer.

[0054] The present invention has no particular limitation on the method for preparing the hydrophilic porous biological carrier, which can be prepared by a person skilled in the art using a well-known method.

[0055] In some preferred embodiments, the hydrophilic porous bio-carrier is prepared by the following method: dry and dehydrated hydrophilic polyether polyol, polyisocyanate, catalyst, chain extender, and uniform foaming agent are mixed, reacted at 70 degrees Celsius and nitrogen for 2 hours to obtain a prepolymer. The prepolymer is mixed with the hydrophilic polyether polyol and the foaming agent, and aged at room temperature for 24 hours to obtain the hydrophilic porous bio-carrier.

[0056] The present invention is described in detail below by way of examples. It is necessary to point out that the following examples are only used to further illustrate the present invention and cannot be construed as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by professionals and technicians in this field based on the content of the present invention still belong to the scope of protection of the present invention. In addition, if there is no other explanation, the raw materials used are all commercially available. Example

[0057] The present embodiment provides an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification. The porosity of the hydrophilic porous biological carrier is 94.1%. The surface of the hydrophilic porous biological carrier contains microscopic pores, and the average pore size of the microscopic pores is 60 nanometers. The hydrophilic porous biological carrier is a hydrophilic porous polymer material, and the hydrophilic porous polymer material is a hydrophilic polyurethane porous material. The raw materials of the hydrophilic polyurethane porous material include hydrophilic polyether polyol and polyisocyanate. The hydrophilic polyurethane porous material can be prepared by the following method.

[0058] The prepolymer is prepared by mixing 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:3) which has been dried and dehydrated, 40 parts of polyisocyanate (PM200 toluene diisocyanate of Dada Chemical), 1 part of catalyst (stannous octoate), 1 part of chain extender (the ratio of ethylene glycol to glycerol is 3:1), and 1 part of foaming agent (organic silicon DC193C) in a weight ratio, and reacting for 2 hours at 70 degrees Celsius and passing nitrogen. The prepolymer is mixed with 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:3) and 10 parts of foaming agent (water), and ripened at room temperature for 24 hours to obtain the hydrophilic porous bio-carrier.

[0059] The method for preparing the hydrophilic porous biological carrier is well known to those skilled in the art and is not described in detail in the present invention. Example

[0060] The present embodiment provides an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification. The porosity of the hydrophilic porous biological carrier is 84.6%. The surface of the hydrophilic porous biological carrier contains microscopic pores, and the average pore size of the microscopic pores is 160 nanometers. The hydrophilic porous biological carrier is a hydrophilic porous polymer material, and the hydrophilic porous polymer material is a hydrophilic polyurethane porous material. The raw materials of the hydrophilic polyurethane porous material include hydrophilic polyether polyol and polyisocyanate. The hydrophilic polyurethane porous material can be prepared by the following method.

[0061] The prepolymer is prepared by mixing 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:1) which has been dried and dehydrated, 40 parts of polyisocyanate (PM200 toluene diisocyanate of Dada Chemical), 1 part of catalyst (stannous octoate), 1 part of chain extender (the ratio of ethylene glycol to glycerol is 3:1), and 1 part of foaming agent (organic silicon DC193C) in a weight ratio, and reacting for 2 hours at 70 degrees Celsius and passing nitrogen. The prepolymer is mixed with 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:1) and 10 parts of foaming agent (water), and ripened at room temperature for 24 hours to obtain the hydrophilic porous bio-carrier.

[0062] The method for preparing the hydrophilic porous biological carrier is well known to those skilled in the art and is not described in detail in the present invention. Example

[0063] The present embodiment provides an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification. The porosity of the hydrophilic porous biological carrier is 82.4%. The surface of the hydrophilic porous biological carrier contains microscopic pores, and the average pore size of the microscopic pores is 400 nanometers. The hydrophilic porous biological carrier is a hydrophilic porous polymer material, and the hydrophilic porous polymer material is a hydrophilic polyurethane porous material. The raw materials of the hydrophilic polyurethane porous material include hydrophilic polyether polyol and polyisocyanate. The hydrophilic polyurethane porous material can be prepared by the following method.

[0064] The prepolymer is prepared by mixing 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 4:1) which has been dried and dehydrated, 40 parts of polyisocyanate (PM200 toluene diisocyanate of Dada Chemical), 1 part of catalyst (stannous octoate), 1 part of chain extender (the ratio of ethylene glycol to glycerol is 1:1), and 1 part of foaming agent (organic silicon DC193C) in a weight ratio, and reacting for 2 hours at 70 degrees Celsius and passing nitrogen. The prepolymer is mixed with 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 4:1) and 10 parts of foaming agent (water), and ripened at room temperature for 24 hours to obtain the hydrophilic porous bio-carrier.

[0065] The method for preparing the hydrophilic porous biological carrier is well known to those skilled in the art and is not described in detail in the present invention. Example

[0066] The present embodiment provides an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification. The porosity of the hydrophilic porous biological carrier is 79.5%. The surface of the hydrophilic porous biological carrier contains microscopic pores, and the average pore size of the microscopic pores is 620 nanometers. The hydrophilic porous biological carrier is a hydrophilic porous polymer material, and the hydrophilic porous polymer material is a hydrophilic polyurethane porous material. The raw materials of the hydrophilic polyurethane porous material include hydrophilic polyether polyol and polyisocyanate. The hydrophilic polyurethane porous material can be prepared by the following method.

[0067] The prepolymer is prepared by mixing 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:3) which has been dried and dehydrated, 40 parts of polyisocyanate (PM200 toluene diisocyanate of Dada Chemical), 1 part of catalyst (stannous octoate), 1 part of chain extender (the ratio of ethylene glycol to glycerol is 1:1), and 1 part of foaming agent (organic silicon DC193C) in a weight ratio, and reacting for 2 hours at 70 degrees Celsius and passing nitrogen. The prepolymer is mixed with 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:3), 10 parts of foaming agent and water, and ripening at room temperature for 24 hours to obtain the hydrophilic porous bio-carrier.

[0068] The method for preparing the hydrophilic porous biological carrier is well known to those skilled in the art and is not described in detail in the present invention. Example

[0069] The present embodiment provides an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification. The porosity of the hydrophilic porous biological carrier is 81.6%. The surface of the hydrophilic porous biological carrier contains microscopic pores, and the average pore size of the microscopic pores is 810 nanometers. The hydrophilic porous biological carrier is a hydrophilic porous polymer material, and the hydrophilic porous polymer material is a hydrophilic polyurethane porous material. The raw materials of the hydrophilic polyurethane porous material include hydrophilic polyether polyol and polyisocyanate. The hydrophilic polyurethane porous material can be prepared by the following method.

[0070] The prepolymer is prepared by mixing 60 parts of a hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:3) which has been dried and dehydrated, 40 parts of a polyisocyanate (PM200 toluene diisocyanate of Dada Chemical), 1 part of a catalyst (stannous octoate), and 1 part of a chain extender (the ratio of ethylene glycol to glycerol is 3:1) in a weight ratio, and reacting for 2 hours at 70 degrees Celsius and passing nitrogen. The prepolymer is mixed with 60 parts of a hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:3) and 10 parts of a foaming agent (water), and ripened at room temperature for 24 hours to obtain the hydrophilic porous biocarrier.

[0071] The method for preparing the hydrophilic porous biological carrier is well known to those skilled in the art and is not described in detail in the present invention. Example

[0072] The present embodiment provides an application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification. The porosity of the hydrophilic porous biological carrier is 72.3%. The surface of the hydrophilic porous biological carrier contains microscopic pores, and the average pore size of the microscopic pores is 1200 nanometers. The hydrophilic porous biological carrier is a hydrophilic porous polymer material, and the hydrophilic porous polymer material is a hydrophilic polyurethane porous material. The raw materials of the hydrophilic polyurethane porous material include hydrophilic polyether polyol and polyisocyanate. The hydrophilic polyurethane porous material can be prepared by the following method.

[0073] The prepolymer is prepared by mixing 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 4:1) which has been dried and dehydrated, 40 parts of polyisocyanate (PM200 toluene diisocyanate of Dada Chemical), 1 part of catalyst (stannous octoate), 1 part of chain extender (the ratio of ethylene glycol to glycerol is 3:1), and 1 part of foaming agent (organic silicon DC193C) in a weight ratio, and reacting for 2 hours at 70 degrees Celsius and passing nitrogen. The prepolymer is mixed with 60 parts of hydrophilic polyether polyol (the mass ratio of propylene oxide to ethylene oxide is 1:3) and 1 part of foaming agent (water), and ripened at room temperature for 24 hours to obtain the hydrophilic porous bio-carrier.

[0074] The method for preparing the hydrophilic porous biological carrier is well known to those skilled in the art and is not described in detail in the present invention.

[0075] Performance Testing

[0076] The hydrophilic porous bio-carriers prepared in Examples 1-6 were subjected to porosity test (mercury intrusion method), ammonia nitrogen removal rate test and microbial community structure analysis.

[0077] The hydrophilic porous biological carrier prepared in Example 1-6 was sheared into a cube of about 1 cm, and an equal amount of the carrier was placed in a 250 ml conical flask, and an equal amount of activated sludge and simulated water were added, and the culture was placed in a shaker at 25 ° C and 150 rpm, and 20 ml of culture medium was added for biofilm formation, and the biofilm formation was continued for 15 days under aerobic conditions. After the biofilm formation was successful, the carrier was taken out, and the residual amount of ammonia nitrogen in the culture medium was tested, that is, the ammonia nitrogen removal rate, and the microbial community structure of the carrier was analyzed. The culture medium provided ammonia nitrogen with ammonium chloride, containing 20 mg / L ammonia nitrogen, and the other components contained in the culture medium were 1.00 g / L K2PO4, 0.10 g / LMgSO4.6H2O, 0.02 g / L CaCl.H2O, 0.005 g / L FeSO4.7H2O, 0.50 g / L KCl, 0.8 g / L NaHCO3, and 1 ml trace elements. The results of the microbial community structure analysis are represented by A, B, and C. A means that a large number of Pseudomonas and nitrifying bacteria are enriched and grown on the carrier, B means that the number of Pseudomonas and nitrifying bacteria on the carrier is small, and C means that there are only a few Pseudomonas and nitrifying bacteria on the carrier.

[0078] Table 1 Performance test results

[0079]

[0080] From the performance test results in Table 1, it can be seen that the porosity of the porous biological carrier is above 90%, the ammonia nitrogen removal is excellent, and a large number of Pseudomonas and nitrifying bacteria can be enriched on the carrier. That is, the hydrophilic porous biological carrier described in the present invention can have excellent performance in the field of aquaculture water purification.

[0081] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the specification and described above. However, any technician familiar with the profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, which are all equivalent embodiments of the present invention. At the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. Application of a hydrophilic porous biological carrier in the field of circulating aquaculture water purification, characterized in that: The porosity of the hydrophilic porous biological carrier is 94.1%, the surface of the hydrophilic porous biological carrier contains microscopic pores, the average pore size of the microscopic pores is 60 nanometers, the hydrophilic porous biological carrier is a hydrophilic porous polymer material, the hydrophilic porous polymer material is a hydrophilic polyurethane porous material, the raw materials of the hydrophilic polyurethane porous material include hydrophilic polyether polyol and polyisocyanate, and the hydrophilic polyurethane porous material can be prepared by the following method; The prepolymer is prepared by mixing 60 parts of a hydrophilic polyether polyol which has been dried and dehydrated, wherein the mass ratio of propylene oxide to ethylene oxide is 1:3, 40 parts of a polyisocyanate, wherein the polyisocyanate is PM200 toluene diisocyanate, 1 part of a catalyst, wherein the catalyst is stannous octoate, 1 part of a chain extender, wherein the ratio of ethylene glycol to glycerol is 3:1, and 1 part of a uniform foaming agent, wherein the uniform foaming agent is organic silicon DC193C, and reacting the mixture at 70 degrees Celsius for 2 hours under the condition of nitrogen gas flow; the prepolymer is mixed with 60 parts of a hydrophilic polyether polyol, wherein the mass ratio of propylene oxide to ethylene oxide is 1:3, and 10 parts of a foaming agent, wherein the foaming agent is water, and ripening the mixture at room temperature for 24 hours to obtain the hydrophilic porous bio-carrier; The ammonia nitrogen removal rate of the hydrophilic porous biological carrier is 93.5%; The number average molecular weight of the hydrophilic polyether polyol is 1000-6000; The hydrophilic porous biological carrier uses the microbial membrane on the surface of the carrier to purify organic matter; The microorganisms in the microbial film include Pseudomonas and nitrifying bacteria.

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